3 files changed, 31 insertions, 0 deletions
diff --git a/lib/factories/curves.js b/lib/factories/curves.js
index f6db460..b5d6c84 100644
--- a/lib/factories/curves.js
+++ b/lib/factories/curves.js
@@ -5,6 +5,13 @@ import TriplePhase from '../components/triple_phase';
 import TripleAmplitude from '../components/triple_amplitude';
 import Color from '../components/color';
 
+/**
+  * This file is a factory for curves.
+  */
+
+/**
+  * Creates a lissajous curve entity
+  */
 export function lissajousCurve() {
 
   const entity = new Entity();
diff --git a/lib/factories/global.js b/lib/factories/global.js
index bf0360d..4f36a8e 100644
--- a/lib/factories/global.js
+++ b/lib/factories/global.js
@@ -6,6 +6,15 @@ import Radius from '../components/radius';
 import Up from '../components/up';
 import Configuration from '../components/configuration';
 
+/**
+  * This file is a factory for global objects. It doesn't enforce it, but
+  * there should be only one of these entities in the engine at a given
+  * time.
+  */
+
+/**
+  * Creates a data entity that holds the configuration.
+  */
 export function configuration() {
 
   const entity = new Entity();
@@ -14,6 +23,9 @@ export function configuration() {
   return entity;
 }
 
+/**
+  * Creates a camera, used to modify the 3D view.
+  */
 export function camera() {
 
   const entity = new Entity();
diff --git a/lib/factories/ui.js b/lib/factories/ui.js
index cc34579..167c618 100644
--- a/lib/factories/ui.js
+++ b/lib/factories/ui.js
@@ -1,3 +1,10 @@
+/**
+  * This file is a factory for DOM UI elements.
+  */
+
+/**
+  * Returns a settings container that includes a section and a heading.
+  */
 export function settingsContainer({id, label, level=2}) {
 
   const container = document.createElement('section');
@@ -6,6 +13,11 @@ export function settingsContainer({id, label, level=2}) {
   return container;
 };
 
+/**
+  * Returns a slider that includes a label, and can optionally be set to
+  * "shift" to a different step. (eg. we use this for π mode, where frequency
+  * and amplitude are mapped to π/8 increments.
+  */
 export function slider({
   id,
   min,